/
test-stream-duplex-from.js
146 lines (138 loc) · 3.39 KB
/
test-stream-duplex-from.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
'use strict';
const common = require('../common');
const assert = require('assert');
const { Duplex, Readable, Writable, pipeline } = require('stream');
{
const d = Duplex.from({
readable: new Readable({
read() {
this.push('asd');
this.push(null);
}
})
});
assert.strictEqual(d.readable, true);
assert.strictEqual(d.writable, false);
d.once('readable', common.mustCall(function() {
assert.strictEqual(d.read().toString(), 'asd');
}));
d.once('end', common.mustCall(function() {
assert.strictEqual(d.readable, false);
}));
}
{
const d = Duplex.from(new Readable({
read() {
this.push('asd');
this.push(null);
}
}));
assert.strictEqual(d.readable, true);
assert.strictEqual(d.writable, false);
d.once('readable', common.mustCall(function() {
assert.strictEqual(d.read().toString(), 'asd');
}));
d.once('end', common.mustCall(function() {
assert.strictEqual(d.readable, false);
}));
}
{
let ret = '';
const d = Duplex.from(new Writable({
write(chunk, encoding, callback) {
ret += chunk;
callback();
}
}));
assert.strictEqual(d.readable, false);
assert.strictEqual(d.writable, true);
d.end('asd');
d.on('finish', common.mustCall(function() {
assert.strictEqual(d.writable, false);
assert.strictEqual(ret, 'asd');
}));
}
{
let ret = '';
const d = Duplex.from({
writable: new Writable({
write(chunk, encoding, callback) {
ret += chunk;
callback();
}
})
});
assert.strictEqual(d.readable, false);
assert.strictEqual(d.writable, true);
d.end('asd');
d.on('finish', common.mustCall(function() {
assert.strictEqual(d.writable, false);
assert.strictEqual(ret, 'asd');
}));
}
{
let ret = '';
const d = Duplex.from({
readable: new Readable({
read() {
this.push('asd');
this.push(null);
}
}),
writable: new Writable({
write(chunk, encoding, callback) {
ret += chunk;
callback();
}
})
});
assert.strictEqual(d.readable, true);
assert.strictEqual(d.writable, true);
d.once('readable', common.mustCall(function() {
assert.strictEqual(d.read().toString(), 'asd');
}));
d.once('end', common.mustCall(function() {
assert.strictEqual(d.readable, false);
}));
d.end('asd');
d.once('finish', common.mustCall(function() {
assert.strictEqual(d.writable, false);
assert.strictEqual(ret, 'asd');
}));
}
{
const d = Duplex.from(Promise.resolve('asd'));
assert.strictEqual(d.readable, true);
assert.strictEqual(d.writable, false);
d.once('readable', common.mustCall(function() {
assert.strictEqual(d.read().toString(), 'asd');
}));
d.once('end', common.mustCall(function() {
assert.strictEqual(d.readable, false);
}));
}
{
// https://github.com/nodejs/node/issues/40497
pipeline(
['abc\ndef\nghi'],
Duplex.from(async function * (source) {
let rest = '';
for await (const chunk of source) {
const lines = (rest + chunk.toString()).split('\n');
rest = lines.pop();
for (const line of lines) {
yield line;
}
}
yield rest;
}),
async function * (source) { // eslint-disable-line require-yield
let ret = '';
for await (const x of source) {
ret += x;
}
assert.strictEqual(ret, 'abcdefghi');
},
common.mustCall(() => {}),
);
}